312 
bulletin of the bureau of fisheries. 
Euprynma scolopes Berry 1913. (PI. X1.IX, fig. 5-8, text fig. 23-26.) 
Euprymna morsei Berry 1909, p. 418 (locality record only), not of Verrill. 
Euprymna scolopes Berry I 9 i 3 > p. 564. 
Animal small, sepioliform. Body short, thick, roimded; the transverse diameter usually equal to 
about two-thirds to four-fifths of the length, but the entire outline and proportions ver^^^ variable. Fins 
large, semicircular; attached with a considerable degree of obliquity a little in advance of the middle of 
the body; broadest posteriorly; anterior lobe conspicuous 
and abruptly notched at its inward margin, so that the fin is 
actually attached along only about the posterior two-thirds 
of its length. Mantle united with the head in the nuchal 
region by a broad commissure, so that the pallial aperture 
extends but a verjr small distance past the eyeball, which 
it partially encompasses posteriorly. Ventrally the man- 
tle margin is sinuous and somewhat produced forward on 
either side of the frmnel, though with a more or less con- 
spicuous emargination just beneath the latter. 
Head somewhat broader than long, its transverse 
diameter usually a little less than that of the mantle, 
but sometimes slightly exceeding it; broadly flattened 
above, somewhat hollowed out below for the accommo- 
dation of the ftumel. Eyes somewhat swollen, large and 
prominent. Funnel elongate conical; the extremity 
nearly cylindrical, with thick walls, and a small apical 
aperture; tip nearly or quite attaining the base of the 
ventral arms; interior walls of tip minutely striate longi- 
tudinally; the minute spoon-shaped valve is situated on 
the dorsal wall just back of the striated area and is suc- 
ceeded posteriorly by a region of strong transverse 
striation. Funnel organ posterior in position and very 
similar to that of E. morsei 
(see Berry 1912b, p. 409). 
Arms rather short, stout; 
usually as long as or a little 
longer than the mantle; un- 
equal, the brachial formula 
consistently 2, 3 ,4,1, although 
the dorsal arms are only a 
little shorter than the ventral; 
outer surfaces of ventral arms rounded, the others all furnished with a 
delicate colorless carina or fold of membrane, best developed on the third 
arms, but sometimes obscme even there. Umbrella rudimentary or lacking 
(in some specimens) between the dorsal arms as well as those of the ventral 
pair; better developed between the dorsal and second arms and between 
these and the third pair; between each third arm and its ventral com- 
panion it forms the usual broad sheath inclosing the base of the tentacle. 
Suckers on all the arms in two rows at the extreme base, but the succeeding 
pairs soon undergo an alternate lateral displacement, resulting in a foiu-rowed condition, which prevails 
practically to the extremities of the arms; pedicels stout, conical; cups spherical, with small apertures, 
and easily lost through abrasion; homy rings of larger suckers (at least in the female) smooth. 
In the female the suckers of the various arms are relatively minute and of subequal size at homologus 
regions of the arms, but in the male a number of important modifications occur. In specimens of the 
latter sex the left dorsal arm is conspicuously hectocotylized; the first four pairs of suckers at the base 
Fig. 23. — Euprymna scolopes, ventral view of male 
[320] type, X iK. Drawn by R. D. Hudson. 
Fig. 24. — Euprymna scolopes, 
dorsal view of head of male 
[320), X Drawn by R. L. 
Hudson. 
